John Langley, a creator of “Cops,” the stark-looking reality television crime series that followed police officers on drug busts, domestic disputes and high-speed chases for more than 30 years, died on Saturday June 26 2021 in Baja, Mexico. He was 78. Mr. Langley apparently had a heart attack while driving with a navigator in the Ensenada San Felipe 250 Coast to Coast off-road race, said Pam Golum, the spokeswoman for Langley Productions. “Cops,” which made its debut on Fox in 1989 and ran until last year. Created with Malcolm Barbour, was supposed to be an unbiased look at law enforcement, and Mr. Langley later saw it as a truer expression of reality TV than series that followed. When Fox did cancel “Cops,” it was swiftly resuscitated by Spike TV (now the Paramount Network). Last year, however, amid protests over the police murder of George Floyd in Minneapolis and calls for criminal justice reform and police accountability, Paramount dropped the show. John Russell Langley Jr. was born on June 1, 1943, in Oklahoma City and moved to Los Angeles with his family when he was a baby. His father was an oil wildcatter. His mother, Lurleen (Fox) Langley, was a homemaker. After serving in Army intelligence in the early 1960s — he was in Panama during the Cuban missile crisis — Mr. Langley earned bachelor’s and master’s degrees in English literature from California State University, Dominguez Hills, and studied for a Ph.D. in the philosophy of aesthetics at the University of California, Irvine, but did not complete his degree. He worked in marketing for Northwest Airlines, wrote short stories and a screenplay, and had a job with a company — where he met Mr. Barbour — that produced press kits and posters for movies. Forming their own company, the two men directed “Cocaine Blues” (1983), a documentary about the perils of cocaine abuse, which led them to make an antidrug music video, “Stop the Madness,” for Ronald Reagan’s White House in 1985. (Mr. Barbour retired from producing in 1994.) “Cops” spawned several other unscripted crime series by Mr. Langley, including “Las Vegas Jailhouse,” “Jail,” “Street Patrol,” “Undercover Stings” and “Vegas Strip,” which he produced with his son Morgan, the executive vice president of development at Langley Productions. Mr. Langley was a producer of feature films as well, including Antoine Fuqua’s “Brooklyn’s Finest” and Tim Blake Nelson’s “Leaves of Grass,” both released in 2009. In addition to his son, Mr. Langley is survived by his wife, Maggie (Foster) Langley; their daughter, Sarah Langley Dews; another son, Zak, who is the senior vice president of music at Langley Productions; a daughter, Jennifer Blair, from a previous marriage to Judith Knudson, which ended in divorce, and seven grandchildren.